... is Borosilicate : Borosilicateglass is comprised mainly of silica (approx 80%) and boron (approx 13%). This type of glass melts at a higher temperature and has a shorter working time. It is an extremely versatile glass that...

... BK7 GlassFloatGlass BOROFLOAT flat glass has excellent optical characteristics because of the high quality resulting from the floatglass process. BOROFLOAT is a excellent equivalent to PYREX, this opens up new applications for borosilicate flat glass...